Claude Code mod

session-relay

Sessions hand work to each other and get the result back: one plans, another builds, and the answer returns to whoever asked.

Workflow mods Plugin marketplaceValidates on Claude Code 2.1.316 Source

Install

Inside Claude Code
/plugin marketplace add jo-greco/johnny-mods
/plugin install session-relay@johnny-mods

Mods install like plugins. Run /reload-plugins or start a new session to load it.

What it can access

Reach
L2Writes or runs: drives Claude, reads mod state, draws
Sees
mcp__session-relay__handoff_send calls, mcp__session-relay__handoff_reply calls
Hooks
session.starttool.calltool.checksession.receivecommand.run

From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.

How Claude Code mods work

  • A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
  • It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
  • Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
  • Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Claude Code docs

Details

Repository
jo-greco/johnny-mods
Folder
session-relay
Marketplace
johnny-mods
Author
Johnny Greco
Type
Workflow mods
License
MIT
Last updated
12 October 2026
Listed in
awesome-claude-code-mods

FAQ

What is session-relay?

Sessions hand work to each other and get the result back: one plans, another builds, and the answer returns to whoever asked. It is a mod for Claude Code, from jo-greco/johnny-mods on GitHub.

What can the session-relay mod access?

Its widest reach is "writes or runs" (drives Claude, reads mod state, draws). It sees mcp__session-relay__handoff_send calls, mcp__session-relay__handoff_reply calls. Like any mod, it runs with your permissions.

How do I install session-relay?

Inside Claude Code (v2.1.287 or later), run /plugin marketplace add jo-greco/johnny-mods and then /plugin install session-relay@johnny-mods.

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